78891516 has 72 divisors (see below), whose sum is σ = 224855120. Its totient is φ = 23902560.

The previous prime is 78891499. The next prime is 78891517. The reversal of 78891516 is 61519887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78891517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10050 + ... + 16086.

Almost surely, 2^78891516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78891516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112427560).

78891516 is an abundant number, since it is smaller than the sum of its proper divisors (145963604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78891516 is a wasteful number, since it uses less digits than its factorization.

78891516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6072 (or 6053 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 78891516 is about 8882.0896190030. The cubic root of 78891516 is about 428.8875444887.

The spelling of 78891516 in words is "seventy-eight million, eight hundred ninety-one thousand, five hundred sixteen".